5-2a=7

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Solution for 5-2a=7 equation: 


Simplifying
5 + -2a = 7

Solving
5 + -2a = 7

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + -2a = 7 + -5

Combine like terms: 5 + -5 = 0
0 + -2a = 7 + -5
-2a = 7 + -5

Combine like terms: 7 + -5 = 2
-2a = 2

Divide each side by '-2'.
a = -1

Simplifying
a = -1

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